Black Stuff on Gardenia Leaves

Question

My gardenia bush has black stuff all over the leaves where it is usually shiny.

Answer 1

It is sooty mold. This article will help you:
https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm

Answer 2

do you think it could be a fungus